Stephen Brennan is an actor known for his role as Niall Haverty in the television series "Father Ted." He has also appeared in various productions, including musicals and plays at the Abbey Theatre.
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| 2023 | PANTO as The Dame |
| 2021 | Son Düello as Physician |
| 2003 | The Boys & Girl from County Clare as Miko |
| 2001 | A Piece of Monologue |
| 2001 | Waiting for Godot as Lucky |
| 2000 | St. Patrick: The Irish Legend as Briain |
| 1999 | Shergar as Mr. Faloon |
| 1999 | Mystic Knights of Tir Na Nog as King Conchobar |
| 1998 | Kod Adı: General as Arthur Ryan |
| 1996 | Samuel Beckett: As the Story Was Told as Voice |
| 1991 | The Miracle as Johnny / Destry, Destry Rides Again |
| 1990 | Il piccolo popolo as Oscar |
| 1989 | Dick Francis: Twice Shy as Mike Needham |
| 1988 | El complot dels anells as Mike O'Brian |
| 1986 | Eat the Peach as Vinnie |
| 1978 | A Child's Voice as Producer's Assistant |
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